电阻率

Firstly, the three-dimension boundary question and its corresponding variation question concerning the point-source electrical field on a 3-D structure are presented. Secondly, the finite element method is used to solve the variational equation. The study area is divided into many tetrahedral elements. Then, we interpolate with a tri-linear function in each element. So, the variational equation is converted into a linear equation system. Finally, taking into account saving of time, we make use of symmetric successive overrelaxation preconditioned conjugate gradient algorithm to solve large linear system, and obtain the potential value of each node, resulting in the calculation of the apparent resistivity values on the ground surface.

首先给出了三维构造中点源电场的边值问题以及相应的变分问题；然后利用有限单元法求解变分问题，采用四面体单元对研究区域进行剖分，在单元中进行三线性函数插值，将变分方程化为线性代数方程组；最后，考虑到节约计算时间，利用对称超松弛预条件共轭梯度迭代算法求解大型线性方程组，得到了各节点的电位值，进而计算出地表的视电阻率。

In this study, symmetric successive overrelaxation preconditioned conjugate gradient algorithm is used to solve large linear system derived from 3-D finite-element resistivity forward modeling. Using row-indexed sparse storage mode to store coefficient matrix, the algorithm converges much quickly and requires much less storage of computer.

引入对称超松弛预条件共轭梯度迭代算法求解电阻率三维有限元计算形成的大型线性方程组，并有机结合系数矩阵的稀疏存储模式，使得三维有限元正演计算的速度大大提高而内存需求则大大减少。

The Bi2Te3 film is p-type semiconductor film, and the resistivity will decrease along with the thickness increasing of films.

得到的P-型半导体Bi2Te3薄膜，其电阻率随薄膜厚度的增大而减小。

CuI is a P-type semiconductor material with 3.2eV bandwidth and stable performance in chemistry and physics. Its resistivity can be changed with concentration, and CuI film is transparent for visible band of light.

CuI是一种高带隙宽度的P型半导体材料，带宽为3.2ev，物理化学性质稳定，制备成本低廉，电阻率可随浓度改变，在可见光范围内透明等优点。

In comparison with the HD measured configuration, it can't make full use of all poles. It takes much longer time to inverse only several sounding points, and in the calculation of partial derivatives Jacobian matrix.

与高密度电阻率法测量装置对比，其对电极的利用率较低，仅几个电测深点的反演就需要很长的时间。

And aim at different item of perambulation geology assignment, adopting different measure device construction.

阐述了高密度电阻率法的工作原理、仪器设备、测量装置及20余年的数据处理过程和体会。

The high density resistivity method is a effective perambulation method in the perambulation domain.

多年来工作成果表明：高密度电阻率法在工程勘查中具有仪器轻便、施工便捷、数据采集量大、地质信息丰富、成果可信等优势，是工程勘查领域一种可行有效的勘查方法。

The results indicate that the contents of Graphite affect the resistivity of GSIFCON, and have clear percolation threshold values.

试验结果表明，石墨掺量对GSIFCON 电阻率变化有明显的影响且存在明显的渗滤阈值。

Experiments and applications on orefields manifest: Arrayed audio magnetotelluric system has the following advantages,e.g.,portability,high efficiency and large surveying depth,it is suitable to do survey in many different landforms,especially for large depth survey in difficult conditions and perdu resources exploration.

经矿区试验应用表明，阵列天然场电磁法探测技术系统具有轻便高效大深度探测的特点，适宜于不同地貌景观尤其是困难条件下隐伏资源的大深度探测，而混场源电磁法探测技术系统不仅可获取大深度的天然场电阻率信息，还能获取人工场激电信息，可广泛应用于金属矿资源、地下水资源及油气资源的勘查。

Considering the horizontal coherency of spatial structures in physiographic fractured surfaces, the Kriging method of geostatistics was introduced to correct the distorted sections of apparent resistivity and phase.

考虑到地学断面的空间结构横向上存在着一定的相关性，引入地质统计学的克里格方法以校正畸变的视电阻率断面和相位断面。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。